Best Spot To Get 50cc/100cc Kids Atvs

Hello allJust wondering where the best spot would be to pick up a 50/100cc atv for my 6 year old. He is growing out of his electric tractor and the batteries wear out quick. He likes to do work with his tractor (haul grass clippins, dirt, etc) I was also wondering if anyone has any recomendations on an atv.Looking for a place around ottawa or brockville to pick it up.thanks